/**
 * Copyright 2011 Joe Choi, All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0

 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package tec.data.structure;

import tao.data.structure.Attribute;
import tao.data.structure.Relation;
import tao.data.structure.Set;
import tao.data.structure.Tuple;

/**
 * @author Joe Choi
 */
public class ConcreteRelation<H> implements Relation<H> {
	
	@SuppressWarnings("unchecked")
	public ConcreteRelation(Attribute<H, ?>... attris) {
		heading = new ConcreteSet<Attribute<H, ?>>(attris);
		body = new ConcreteSet<Tuple<H, ?, ?>>();
	}
	
	public ConcreteRelation(Attribute<H, ?>[] attris, Tuple<H, ?, ?>[] tuples) {
		heading = new ConcreteSet<Attribute<H, ?>>(attris);
		body = new ConcreteSet<Tuple<H, ?, ?>>(tuples);
	}

	@Override
	public Set<Attribute<H, ?>> getHeading() {
		return(heading);
	}

	@Override
	public Set<Tuple<H, ?, ?>> getBody() {
		return(body);
	}
	
	private Set<Attribute<H, ?>> heading;
	private Set<Tuple<H, ?, ?>> body;
}